The CAS Registry Mumber 1443342-44-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,4,3,3,4 and 2 respectively; the second part has 2 digits, 4 and 4 respectively. Calculate Digit Verification of CAS Registry Number 1443342-44: (9*1)+(8*4)+(7*4)+(6*3)+(5*3)+(4*4)+(3*2)+(2*4)+(1*4)=136 136 % 10 = 6 So 1443342-44-6 is a valid CAS Registry Number.
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